US4697566A - Method of controlling electronic fuel injection to internal combustion engine - Google Patents

Method of controlling electronic fuel injection to internal combustion engine Download PDF

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Publication number
US4697566A
US4697566A US06/927,938 US92793886A US4697566A US 4697566 A US4697566 A US 4697566A US 92793886 A US92793886 A US 92793886A US 4697566 A US4697566 A US 4697566A
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US
United States
Prior art keywords
fuel injection
internal combustion
electronic
combustion engine
cylinders
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
US06/927,938
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English (en)
Inventor
Mikihiko Ohnari
Motohisa Funabashi
Makoto Shioya
Teruji Sekozawa
Masami Shida
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Hitachi Ltd
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Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Assigned to HITACHI, LTD., A CORP. OF JAPAN reassignment HITACHI, LTD., A CORP. OF JAPAN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FUNABASHI, MOTOHISA, OHNARI, MIKIHIKO, SEKOZAWA, TERUJI, SHIDA, MASAMI, SHIOYA, MAKOTO
Application granted granted Critical
Publication of US4697566A publication Critical patent/US4697566A/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/02—Cutting-out
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation

Definitions

  • the present invention relates to a method of controlling electronic fuel injection to an internal combustion engine and, more particularly, to a method of controlling fuel injection having high reliability which enables an engine to be constantly driven without being stopped by a trouble of a part of an electronic circuit.
  • a conventional mechanical supply system composed of a carburetor scarcely causes sudden trouble and, in most cases, malfunction is gradually sensed and foreseen, so that the reliability of the carburetor system is secured by preventive maintenance and routine checkup.
  • the reliability of electronic parts if initial failure is eliminated by accelerated test, there remains only a probability of the rest of the parts generating random failure.
  • a method of allowing redundancy on the level of parts, circuits and system is often adopted.
  • a method of allowing redundancy on the level of parts and circuits is lacking in practicality because cost is raised due to increase in the number of parts, the decision circuit for judging the quality of parts and circuits is not always reliable, and the system becomes complicated by the incorporation of a defective part identifying circuit and an alarm circuit. If a redundancy system is adopted, a defective part must be replaced immediately in order to preserve the characteristic of the redundancy system. In order to maintain the reliability, it is desirable that immediately after a trouble is caused, a certain extent of burden is put to the driver, thereby urging the driver to replace the defective part.
  • FIG. 1 shows the structure of an engine control system to which the present invention is applied.
  • FIG. 2 is a flow chart which shows the operation and the process of a decision circuit.
  • FIG. 1 a 6-cylinder engine 11 having cylinders 1 to 6 is illustrated. Each cylinder is provided with an injector for fuel injection. The cylinders of the engine 11 are divided into two groups, and the amount of fuel injection and the injection timing of the cylinders 1, 3 and 5 are controlled by a control circuit 12, while those of the cylinders 2, 4 and 6 are controlled by a control circuit 13.
  • the ignition system is the same as in the prior art.
  • Each control circuit is different from a conventional electronic fuel injection control apparatus only in the following points. The input of a signal from each sensor and contents of carculation are approximately the same as conventional ones.
  • control circuit 12 controls the cylinders 1, 3 and 5 of odd numbers, while the control circuit 13 controls the cylinders 2, 4 and 6 of even numbers.
  • Each control circuit detects the rotational speed of a shaft by a tachometer 16, a measured value 17 of air flow by an air flow meter (not shown), a cooling water temperature 18 by an engine cooling device (not shown), and other pieces of information (not shown) necessary for controlling the rotational frequency of the engine. Synchronization of the control circuits is carried out on the basis of the timing pulses which are synchronous with the rotation of the engine and which are detected by a timing pulse detector 19.
  • the normal or abnormality of the control circuits is decided by decision circuits 14 and 15 which are provided in correspondence to the respective control circuits. It is possible to incorporate the decision circuits into the respective control circuits. Each decision circuit fetches the calculated outputs of the control circuits 12 and 13, and judges whether there is a large difference between the calculated outputs of the control circuits 12 and 13. The process of decision is shown in FIG. 2.
  • the fuel injection periods, which are the outputs of the control circuits 12 and 13, are assumed to be T 2 and T 3 , respectively.
  • the decision circuit gives information to the driver on which control circuit is decided to be out of order.
  • the driver manually cuts out the defective control circuit when he is informed of the defect of the control circuit, thereby stopping the supply of the fuel to the cylinders which are controlled by that control circuit. Simultaneously, he controls the remaining half cylinders by the normal control circuit.
  • the manual cut-out is executed merely by designating the defective control circuit and switching in the interior of the car. That is, it is executed by cutting off the outputs of the other control circuit and the decision circuit which have been input to each control circuit by switching. Even if both control circuits are normal, it is possible to practice at driving with half the cylinders by cutting off one of the control circuits.
  • each cylinder in this embodiment, it is possible to provide more than two injectors on a manifold and to provide a control circuit on each injector, providing slight modifications for the circuits.
  • the driver can find the defective circuit easily, if the driver carries a spare control circuit (a printed circuit board), he can replace the printed circuit board in accordance with the instruction.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
US06/927,938 1985-11-13 1986-11-07 Method of controlling electronic fuel injection to internal combustion engine Ceased US4697566A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60252723A JP2511859B2 (ja) 1985-11-13 1985-11-13 内燃機関における燃料噴射制御装置
JP60-252723 1985-11-13

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US07/417,900 Reissue USRE33890E (en) 1985-11-13 1989-10-06 Method of controlling electronic fuel injection to internal combustion engine

Publications (1)

Publication Number Publication Date
US4697566A true US4697566A (en) 1987-10-06

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Family Applications (2)

Application Number Title Priority Date Filing Date
US06/927,938 Ceased US4697566A (en) 1985-11-13 1986-11-07 Method of controlling electronic fuel injection to internal combustion engine
US07/417,900 Expired - Lifetime USRE33890E (en) 1985-11-13 1989-10-06 Method of controlling electronic fuel injection to internal combustion engine

Family Applications After (1)

Application Number Title Priority Date Filing Date
US07/417,900 Expired - Lifetime USRE33890E (en) 1985-11-13 1989-10-06 Method of controlling electronic fuel injection to internal combustion engine

Country Status (4)

Country Link
US (2) US4697566A (ja)
EP (1) EP0222403B1 (ja)
JP (1) JP2511859B2 (ja)
DE (1) DE3668946D1 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4332098A1 (de) * 1993-09-22 1995-03-23 Bayerische Motoren Werke Ag Brennkraftmaschinen-Steuereinrichtung
WO2001065110A2 (de) * 2000-03-01 2001-09-07 Robert Bosch Gmbh Verfahren zur klopfregelung einer verbrennungskraftmaschine
GB2366004A (en) * 2000-08-10 2002-02-27 Bosch Gmbh Robert A method for diagnosing cylinder bank dependant or cylinder bank independent faults in an internal combustion engine
CN100387817C (zh) * 2004-04-27 2008-05-14 株式会社日立制作所 内燃机的诊断系统

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200476B (en) * 1987-01-29 1991-02-06 British Gas Plc Monitor system
JPH0310780A (ja) * 1989-06-05 1991-01-18 Mitsubishi Electric Corp 産業用ロボツト装置
US5027769A (en) * 1989-08-25 1991-07-02 Mitsubishi Jidosha Kogya Kabushiki Kaisha Throttle valve control apparatus
JPH04318253A (ja) * 1991-04-18 1992-11-09 Mitsubishi Heavy Ind Ltd 多気筒エンジン
FR2710107B1 (fr) * 1993-09-14 1995-12-08 Peugeot Procédé de contrôle du fonctionnement d'un moteur à combustion interne et dispositif pour la mise en Óoeuvre d'un tel procédé.
FR2796420B1 (fr) * 1999-07-15 2005-08-19 Renault Dispositif d'injection pour moteur a combustion interne
DE19951581B4 (de) * 1999-10-27 2012-04-26 Robert Bosch Gmbh Verfahren und Vorrichtung zur Gleichstellung wenigstens zweier Zylinderbänke einer Brennkraftmaschine
US6588398B1 (en) * 2001-12-18 2003-07-08 Caterpillar Inc Automated electronic trim for a fuel injector

Citations (5)

* Cited by examiner, † Cited by third party
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US3834361A (en) * 1972-08-23 1974-09-10 Bendix Corp Back-up fuel control system
US4049957A (en) * 1971-06-23 1977-09-20 Hitachi, Ltd. Dual computer system
GB2104247A (en) * 1981-07-13 1983-03-02 Nissan Motor Automatic control of i c engines in vehicles
JPS58124028A (ja) * 1982-01-20 1983-07-23 Nippon Denso Co Ltd 多気筒内燃機関用燃料噴射制御装置
JPS59108847A (ja) * 1982-12-13 1984-06-23 Japan Electronic Control Syst Co Ltd エンジン制御装置

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Publication number Priority date Publication date Assignee Title
GB1244925A (en) * 1968-10-23 1971-09-02 Brevete Et D Etudes S I B E So Improvements in or relating to fuel feed devices for internal combustion engines
USRE29561E (en) * 1968-11-12 1978-03-07 Lumenition, Ltd. Fuel injection systems for internal combustion engines
US3835825A (en) * 1969-11-21 1974-09-17 Brico Eng Internal combustion engines
US3606869A (en) * 1970-05-11 1971-09-21 Gen Motors Corp Apparatus for electrically synchronizing fuel injection with fuel ignition in an internal combustion engine
JPS5277930A (en) * 1975-12-25 1977-06-30 Nissan Motor Co Ltd Air-fuel ratio controller
DE2838619A1 (de) * 1978-09-05 1980-03-20 Bosch Gmbh Robert Einrichtung zum steuern von betriebsparameterabhaengigen und sich wiederholenden vorgaengen fuer brennkraftmaschinen
JPS57173536A (en) * 1981-04-16 1982-10-25 Nissan Motor Co Ltd Fuel feed controller of internal combustion engine
GB2125578A (en) * 1982-08-16 1984-03-07 Nissan Motor Self monitoring system
DE3234637A1 (de) * 1982-09-18 1984-03-22 Alfred Teves Gmbh, 6000 Frankfurt Verfahren und schaltungsanordnung zur steuerung einer bremsschlupfregelanlage
JPS59213548A (ja) * 1983-05-17 1984-12-03 Nissan Motor Co Ltd 車両用制御システムの故障診断装置
JPS6090942A (ja) * 1983-10-25 1985-05-22 Mazda Motor Corp 電子燃料噴射装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049957A (en) * 1971-06-23 1977-09-20 Hitachi, Ltd. Dual computer system
US3834361A (en) * 1972-08-23 1974-09-10 Bendix Corp Back-up fuel control system
GB2104247A (en) * 1981-07-13 1983-03-02 Nissan Motor Automatic control of i c engines in vehicles
JPS58124028A (ja) * 1982-01-20 1983-07-23 Nippon Denso Co Ltd 多気筒内燃機関用燃料噴射制御装置
JPS59108847A (ja) * 1982-12-13 1984-06-23 Japan Electronic Control Syst Co Ltd エンジン制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BMW Reveals V12 Details from Autocar, Mar. 4, 1987, p. 6. *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4332098A1 (de) * 1993-09-22 1995-03-23 Bayerische Motoren Werke Ag Brennkraftmaschinen-Steuereinrichtung
DE4332098B4 (de) * 1993-09-22 2004-09-30 Bayerische Motoren Werke Ag Brennkraftmaschinen-Steuereinrichtung
WO2001065110A2 (de) * 2000-03-01 2001-09-07 Robert Bosch Gmbh Verfahren zur klopfregelung einer verbrennungskraftmaschine
WO2001065110A3 (de) * 2000-03-01 2002-03-07 Bosch Gmbh Robert Verfahren zur klopfregelung einer verbrennungskraftmaschine
US6769402B2 (en) 2000-03-01 2004-08-03 Robert Bosch Gmbh Method for knock regulation in an internal combustion engine
GB2366004A (en) * 2000-08-10 2002-02-27 Bosch Gmbh Robert A method for diagnosing cylinder bank dependant or cylinder bank independent faults in an internal combustion engine
GB2366004B (en) * 2000-08-10 2002-11-06 Bosch Gmbh Robert Method of operating an internal combustion engine particularly of a motor vehicle
CN100387817C (zh) * 2004-04-27 2008-05-14 株式会社日立制作所 内燃机的诊断系统

Also Published As

Publication number Publication date
USRE33890E (en) 1992-04-21
JP2511859B2 (ja) 1996-07-03
EP0222403A2 (en) 1987-05-20
JPS62113838A (ja) 1987-05-25
DE3668946D1 (de) 1990-03-15
EP0222403A3 (en) 1987-10-07
EP0222403B1 (en) 1990-02-07

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Owner name: HITACHI, LTD., 6, KANDA SURUGADAI 4-CHOME, CHIYODA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:OHNARI, MIKIHIKO;FUNABASHI, MOTOHISA;SHIOYA, MAKOTO;AND OTHERS;REEL/FRAME:004703/0313

Effective date: 19861013

Owner name: HITACHI, LTD., A CORP. OF JAPAN,JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OHNARI, MIKIHIKO;FUNABASHI, MOTOHISA;SHIOYA, MAKOTO;AND OTHERS;REEL/FRAME:004703/0313

Effective date: 19861013

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